[syslinux:pathbased] core: remove obsolete assembly cache.inc
syslinux-bot for H. Peter Anvin
hpa at zytor.com
Tue Feb 16 10:36:11 PST 2010
Commit-ID: 0ae834cebfea4cbc63db07fe927625224e842292
Gitweb: http://syslinux.zytor.com/commit/0ae834cebfea4cbc63db07fe927625224e842292
Author: H. Peter Anvin <hpa at zytor.com>
AuthorDate: Tue, 16 Feb 2010 10:32:29 -0800
Committer: H. Peter Anvin <hpa at zytor.com>
CommitDate: Tue, 16 Feb 2010 10:32:29 -0800
core: remove obsolete assembly cache.inc
Signed-off-by: H. Peter Anvin <hpa at zytor.com>
---
core/cache.inc | 114 --------------------------------------------------------
1 files changed, 0 insertions(+), 114 deletions(-)
diff --git a/core/cache.inc b/core/cache.inc
deleted file mode 100644
index 3b24cf0..0000000
--- a/core/cache.inc
+++ /dev/null
@@ -1,114 +0,0 @@
-; -*- fundamental -*- ---------------------------------------------------
-;
-; Copyright 2004-2008 H. Peter Anvin - All Rights Reserved
-;
-; This program is free software; you can redistribute it and/or modify
-; it under the terms of the GNU General Public License as published by
-; the Free Software Foundation, Inc., 53 Temple Place Ste 330,
-; Boston MA 02111-1307, USA; either version 2 of the License, or
-; (at your option) any later version; incorporated herein by reference.
-;
-; -----------------------------------------------------------------------
-
- section .text16
-
- struc cptr
-.sector: resd 1 ; Sector number
-.prev: resw 1 ; LRU pointer to previous (less recent)
-.next: resw 1 ; LRU pointer to next (more recent)
- endstruc
-cptr_size_lg2 equ 3
-
-NCacheEntries equ 65536/SECTOR_SIZE
-
-;
-; initcache: Initialize the cache data structures
-;
-initcache:
- xor eax,eax ; We don't care about sector 0
- mov di,CachePtrs
- mov cx,NCacheEntries+1
- mov bx,CachePtrs+NCacheEntries*cptr_size ; "prev" pointer
-.loop:
- mov [di+cptr.sector],eax ; Zero sector number
- mov [di+cptr.prev],bx ; Previous pointer
- mov [bx+cptr.next],di ; Previous entry's next pointer
- mov bx,di
- add di,cptr_size
- loop .loop
- ret
-
-;
-; getcachesector: Check for a particular sector (EAX) in the sector cache,
-; and if it is already there, return a pointer in GS:SI
-; otherwise load it and return said pointer.
-;
-; Assumes CS == DS.
-;
-getcachesector:
- push cx
- push bx
- push di
- mov si,cache_seg
- mov gs,si
- mov si,CachePtrs+cptr_size ; Real sector cache pointers
- mov cx,NCacheEntries
-.search:
- cmp eax,[si]
- jz .hit
- add si,cptr_size
- loop .search
-
-.miss:
- TRACER 'M'
- ; Need to load it.
- push es
- push gs
- pop es
- mov bx,[CachePtrs+cptr.next] ; "Next most recent than head node"
- mov [bx+cptr.sector],eax
- mov si,bx
- sub bx,CachePtrs+cptr_size
- shl bx,SECTOR_SHIFT-cptr_size_lg2 ; Buffer address
- pushad
-%if IS_EXTLINUX
- call getonesec_ext
-%else
- call getonesec
-%endif
- popad
- pop es
-.hit:
- ; Update LRU, then compute buffer address
- TRACER 'H'
-
- ; Remove from current position in the list
- mov bx,[si+cptr.prev]
- mov di,[si+cptr.next]
- mov [bx+cptr.next],di
- mov [di+cptr.prev],bx
-
- ; Add to just before head node
- mov bx,[CachePtrs+cptr.prev]
- mov [si+cptr.prev],bx
- mov [bx+cptr.next],si
- mov [CachePtrs+cptr.prev],si
- mov word [si+cptr.next],CachePtrs
-
- sub si,CachePtrs+cptr_size
- shl si,SECTOR_SHIFT-cptr_size_lg2 ; Buffer address
-
- pop di
- pop bx
- pop cx
- ret
-
- section .bss16
-
- ; Each CachePtr contains:
- ; - Block pointer
- ; - LRU previous pointer
- ; - LRU next pointer
- ; The first entry is the head node of the list
- alignb 4
-CachePtrs resb (NCacheEntries+1)*cptr_size
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